As a Christian committed to Jesus Christ, I believe that I should spread the Gospel in my Christian journey because God calls me for the Gospel. For this reason, I need to prepare various strategies on how to share God's love with those who do not know Jesus. Therefore, learning what Muslims believe in their God and think about our God, Jesus Christ, is one of the my strategies for effectively sharing the Gospel with Muslims. Nowadays, Muslims greatly increase and widely invade the whole world. In other words, it is possible to have a chance to meet them in my ministry or on the mission field. When I was studying Missiology for a degree, I rarely had the chance to learn about Islam. However, I have consistently sought to know exactly the differences between Islam and Christianity, having ultimately learned integral approaches to my Christian journey through this book. Over the past two semesters, I have had informal discussions with a professor and my practicing Muslim friends. Each time we discussed God, who is revealed in the book of John. At that time, they asked critical questions that were very sharp and difficult. I believe that if I already read this book before discussing with them, I would give the right answers about God from a Christian perspective. This is it